batgrbproduct analysis for trigger=726885

batgrbproduct Analysis for Trigger=726885

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Jan  4 17:42:37 EST 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger726885
======================================================================

  Trigger: 00726885      Segment: 000

  BAT Trigger Time: 503428827.968   [s; MET]
      Trigger Stop: 503428828.992   [s; MET]
               UTC: 2016-12-14T17:20:10.661200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 3.8505559310649   Dec: 7.34197640243199  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.45
     Image Trigger?:     NO
     Rate S/N Ratio:     19.4164878389476  [ if not an image trigger ]
     Image S/N Ratio:    11.45

  Flight Position:   [ source = BAT ]
    RA: 3.8505559310649   Dec: 7.34197640243199  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 3.85805633694063   Dec: 7.34763785809375  [deg; J2000]  
        { 00h 15m 25.9s , +07d 20' 51.5" }
         +/- 0.899596043202637 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.301516216718472 [arcmin] (formal 1-sigma fit error)
    SNR: 35.3805643773046
 
  Angular difference between Flight and Ground position is 0.560892 arcmin
 
  Partial Coding Fraction: 0.6484375    [ including projection effects ]

  Duration
     T90: 24.8959999680519 +/- 3.18264541986977
        Measured from: 0.403999984264374
                   to: 25.2999999523163     [s; relative to TRIGTIME]
     T50: 8.79999995231628 +/- 1.15527482354514
        Measured from: 3.3759999871254
                   to: 12.1759999394417     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.111999988555908     
                   to: 1.11199998855591     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.423999965190887     
                   to: 30.8280000090599     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.098404   1.343374   0.819190   0.128099
           0.045595   0.048525   0.043230   0.039578 [error]
 Peak      0.079878   0.097454   0.073263   0.030380
           0.009404   0.009919   0.009104   0.007818 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 3.62e-07 5.69e-07 6.75e-07 1.55e-06 2.05e-06 3.16e-06   erg/cm2
              Error 2.76e-08 2.58e-08 4.47e-08 2.21e-07 1.03e-07 2.56e-07   erg/cm2
Peak flux Power-law 7.72e-01 7.51e-01 5.10e-01 5.43e-01 2.25e+00 2.58e+00   ph/cm2/s
              Error 1.45e-01 8.51e-02 7.79e-02 1.73e-01 2.47e-01 2.88e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.62e-07 4.94e-07 5.19e-07 1.22e-06 1.71e-06 2.58e-06   erg/cm2
              Error 3.02e-08 3.06e-08 3.29e-07 4.31e-07 1.10e-07 1.94e-07   erg/cm2
Peak flux Cutoff-PL 7.72e-01 7.51e-01 5.08e-01 5.89e-01 2.25e+00 2.59e+00   ph/cm2/s
              Error -------- -------- 7.85e-02 -------- 2.47e-01 3.22e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.754    0.086    -      -           7.12e-03 3.42e-04   40.690 57
CPL   1.627    0.270     139.0  -34.6      8.30e-03 2.81e-03   40.230 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.558    0.206    -      -           1.77e-02 2.06e-03   53.160 57
CPL   2.252    0.564      92.4    0.0      7.64e-03 0.00e+00   52.170 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom

 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 25.344000 sec.
T50 in the 50-300 keV band: 9.536000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   31.252   -0.424   30.828
T90    24.896    0.404   25.300
T50     8.800    3.376   12.176
Peak    1.000    0.112    1.112

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
    3.8581     7.3476   0.0054    26.8872  -129.8025         2.6413841     35.381 TRIG_00726885                 
 
Foreground time interval of the image:
 -0.424  12.933 (delta_t =  13.357 [sec])
Background time interval of the image:
-182.067  -0.424 (delta_t = 181.643 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

1 s binning

From T0-310 s to T0+310 s

From T100_start - 20 s to T100_end + 30 s

Full time interval

64 ms binning

Full time interval

From T100_start to T100_end

From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from   -0.424 sec. to   30.828 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.75420     ( -0.0858496   0.0867845 )
Norm@50keV  : 7.12195E-03    ( -0.00034332   0.000341194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.69 using 59 PHA bins.
# Reduced chi-squared =         0.7139 for     57 degrees of freedom 
# Null hypothesis probability =   9.494515e-01
 
Photon flux (15-150 keV)    in 31.25 sec: 0.964550 ( -0.044445  0.04453 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.05348e-06 ( -1.02511e-07  1.03223e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.424 sec. to   30.828 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62694     ( -0.337746   0.202226 )
Epeak [keV] : 139.007      ( -69.7813 -139.007 )
Norm@50keV  : 8.29815E-03    ( -0.00157229   0.00404023 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.23 using 59 PHA bins.
# Reduced chi-squared =         0.7183 for     56 degrees of freedom 
# Null hypothesis probability =   9.445994e-01
 
Photon flux (15-150 keV)    in 31.25 sec: 0.956697 ( -0.048383  0.048243 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.70817e-06 ( -1.55063e-07  6.51662e-08 ) ergs/cm2

Band function

Time interval is from   -0.424 sec. to   30.828 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.4561  (  )
R^2/D10^2   : 0.193391  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         161.53 using 59 PHA bins.
# Reduced chi-squared =         2.8339 for     57 degrees of freedom 
# Null hypothesis probability =   6.176860e-12
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.988e-07   1.661e-08
25- 50  6.530e-07   3.359e-08
50-150  6.242e-07   6.203e-08
15-150  1.476e-06   7.688e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 115.633       (-19.7766      32.4504)
Norm        : 4.09539       (-0.264596     0.262828)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.94 using 59 PHA bins.
# Reduced chi-squared =         0.7534 for     57 degrees of freedom 
# Null hypothesis probability =   9.161796e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.338e-07   2.839e-08
25- 50  5.933e-07   3.453e-08
50-150  1.039e-06   2.716e-07
15-150  1.966e-06   3.075e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.60963        (-0.905335      0.968849)
R1^2/D10^2  : 1.42672        (-0.539676      1.01058)
kT2 [keV]   : 25.0775        (-3.95775      5.98714)
R2^2/D10^2  : 1.15827E-02    (-0.00616186   0.0105134)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.76 using 59 PHA bins.
# Reduced chi-squared =         0.7593 for     55 degrees of freedom 
# Null hypothesis probability =   9.058067e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.331e-07   4.831e-08
25- 50  5.832e-07   6.844e-08
50-150  1.094e-06   2.141e-07
15-150  2.010e-06   3.005e-07

Peak spectrum fit

Power-law model

Time interval is from    0.112 sec. to    1.112 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55762     ( -0.203619   0.208171 )
Norm@50keV  : 1.77416E-02    ( -0.00207611   0.00204354 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.16 using 59 PHA bins.
# Reduced chi-squared =         0.9327 for     57 degrees of freedom 
# Null hypothesis probability =   6.197973e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.25103 ( -0.24658  0.24696 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.66863e-07 ( -2.13573e-08  2.16668e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.112 sec. to    1.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.25245     ( -1.03724   0.0911074 )
Epeak [keV] : 92.3761      (   )
Norm@50keV  : 7.64450E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.17 using 59 PHA bins.
# Reduced chi-squared =         0.9316 for     56 degrees of freedom 
# Null hypothesis probability =   6.206574e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.25090 ( -0.24679  0.24679 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.68043e-07 ( -2.80295e-08  1.06675e-08 ) ergs/cm2

Band function

Time interval is from    0.112 sec. to    1.112 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.0167  (-2.08029  2.55961)
R^2/D10^2   : 0.308675  (-0.136372   0.236185)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.14 using 59 PHA bins.
# Reduced chi-squared =          1.441 for     57 degrees of freedom 
# Null hypothesis probability =   1.628854e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.281e-08   2.915e-09
25- 50  4.770e-08   7.580e-09
50-150  6.174e-08   1.488e-08
15-150  1.222e-07   1.821e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.345       (-81.6702      -199.363)
Norm        : 9.11418       (-0.989035     0.989293)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.74 using 59 PHA bins.
# Reduced chi-squared =         0.9603 for     57 degrees of freedom 
# Null hypothesis probability =   5.604229e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.269e-08   1.265e-08
25- 50  4.366e-08   2.380e-08
50-150  9.575e-08   5.240e-08
15-150  1.621e-07   8.375e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.74451        (-1.87292      4.2498)
R1^2/D10^2  : 10.7066        (-9.21223      106.801)
kT2 [keV]   : 22.7343        (-5.9598      33.4197)
R2^2/D10^2  : 5.00425E-02    (-0.0456119   0.126822)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.70 using 59 PHA bins.
# Reduced chi-squared =          1.031 for     55 degrees of freedom 
# Null hypothesis probability =   4.114953e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.572e-08   1.319e-08
25- 50  3.743e-08   1.340e-08
50-150  9.849e-08   4.980e-08
15-150  1.616e-07   4.744e-08

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69463     ( -0.0805748   0.0812348 )
Norm@50keV  : 1.25234E-02    ( -0.000566619   0.000564191 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.44 using 59 PHA bins.
# Reduced chi-squared =         0.6743 for     57 degrees of freedom 
# Null hypothesis probability =   9.719256e-01
 
Photon flux (15-150 keV)    in 13.36 sec: 1.66013 ( -0.0738885  0.0740235 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54979e-06 ( -7.37527e-08  7.41499e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46823     ( -0.327137   0.262875 )
Epeak [keV] : 113.676      ( -41.2237 -113.676 )
Norm@50keV  : 1.63692E-02    ( -0.00418938   0.00753863 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.84 using 59 PHA bins.
# Reduced chi-squared =         0.6578 for     56 degrees of freedom 
# Null hypothesis probability =   9.776208e-01
 
Photon flux (15-150 keV)    in 13.36 sec: 1.63682 ( -0.07987  0.07991 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51782e-06 ( -8.59582e-08  8.57044e-08 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 5.69e-07
S(50-100 keV) = 6.75e-07

T90 vs. Hardness ratio plot

T90                                   = 24.8959999680519 sec.
Hardness ratio (energy fluence ratio) = 1.18629

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.22302
Count Ratio (50-100 keV) / (15-25 keV) = 0.7458

Mask shadow pattern

IMX = -3.245836867057915E-01, IMY = 3.895425678363345E-01

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-182.067400 -0.424000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 48.6719 -13.8462    2.1  47.3  148.4   3.6177   5.4 ------	UNKNOWN                       
  1.6581 -26.5637    2.6  57.2 -154.1   5.7424   4.4 ------	UNKNOWN                       
333.7240  41.7137    3.1  43.2  -53.9   2.2483   3.7 ------	UNKNOWN                       
331.5570  37.3421    4.5  44.8  -60.3   2.5979   2.5 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
-0.424000 12.932600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 53.9613  -7.7836    2.5  45.3  137.6   0.8786   4.6 ------	UNKNOWN                       
  3.8581   7.3476    0.3  26.9 -129.8   2.6411  35.4  497.6	UNKNOWN                       
322.7611  50.3082    2.9  51.4  -43.0   1.0496   4.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
63.932600 955.532600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1852  38.5199   12.7  46.0  -19.2  -1.1941  -0.9   11.9	Cyg X-2                       
 31.8559  30.6752    4.2  35.1   67.1   3.7730   2.8 ------	UNKNOWN                       
  7.9870  16.2403    2.4   9.8   46.5   2.7619   4.9 ------	UNKNOWN                       
339.5976  17.2480    2.4  25.6  -42.6   3.2544   4.9 ------	UNKNOWN                       
359.4492 -49.7306    4.2  57.2 -154.2  12.9046   2.8 ------	UNKNOWN                       
327.9594  -9.4437    4.0  39.5  -92.2   9.2569   2.9 ------	UNKNOWN                       
331.4498 -19.2391    4.1  41.6 -107.9   8.7400   2.9 ------	UNKNOWN

Plot creation:
Thu Jan  5 10:41:58 EST 2017